Active JNK-dependent secretion of Drosophila Tyrosyl-tRNA synthetase by loser cells recruits haemocytes during cell competition

Moreno, Eduardo; Casas-Tintó, S; Lolo, FN (2015). Active JNK-dependent secretion of Drosophila Tyrosyl-tRNA synthetase by loser cells recruits haemocytes during cell competition. Nature communications, 6(10022), pp. 1-12. Nature Publishing Group 10.1038/ncomms10022

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Cell competition is a process by which the slow dividing cells (losers) are recognized and eliminated from growing tissues. Loser cells are extruded from the epithelium and engulfed by the haemocytes, the Drosophila macrophages. However, how macrophages identify the dying loser cells is unclear. Here we show that apoptotic loser cells secrete Tyrosyl-tRNA synthetase (TyrRS), which is best known as a core component of the translational machinery. Secreted TyrRS is cleaved by matrix metalloproteinases generating MiniTyr and EMAP fragments. EMAP acts as a guiding cue for macrophage migration in the Drosophila larvae, as it attracts the haemocytes to the apoptotic loser cells. JNK signalling and Kish, a component of the secretory pathway, are autonomously required for the active secretion of TyrRS by the loser cells. Altogether, this mechanism guarantees effective removal of unfit cells from the growing tissue.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Cell Biology

UniBE Contributor:

Moreno, Eduardo

Subjects:

500 Science > 570 Life sciences; biology

ISSN:

2041-1723

Publisher:

Nature Publishing Group

Language:

English

Submitter:

Eduardo Moreno

Date Deposited:

01 Jun 2016 14:41

Last Modified:

01 Jun 2016 14:41

Publisher DOI:

10.1038/ncomms10022

PubMed ID:

26658841

BORIS DOI:

10.7892/boris.82413

URI:

https://boris.unibe.ch/id/eprint/82413

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